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Core Python Programming Exercises P09-22

9-22.

ZIP Archive Files. The unzip -l command to dump the contents of ZIP archive is boring. Create a Python script called lszip.py that gives additional information such as: the compressed file size, the compressed percentage of each file (by comparing the original and compressed file sizes), and a full time.ctime() timestamp instead of the unzip output (of just the date and HH:MM). Hint: The date_time attribute of an archived file does not contain enough information to feed to time.mktime()... it is up to you!

#!/usr/bin/env python

#-*- coding:utf-8 -*-

#$Id: p0922.py 168 2010-06-29 06:34:01Z xylz $

'''

This is a 'python' study plan for xylz.

'''

import zipfile

import os

import datetime

def list (zip_file,files):

print "list %s files from %s" % (len(files) if files!='*' else 'total',zip_file)

f_in = zipfile.ZipFile(zip_file, 'r')

infoes = None

if '*' == files:

infoes = f_in.infolist()

else:

infoes = []

for f in files:

infoes.append(f_in.getinfo(f))

print "filename:\t\tuncompress\tcompress\tpercent\tcreatetime"

print "-----------------------------------------"

total_usize,total_csize = (0,0)

for info in infoes:

(year, month, day, hour, minute, second) = info.date_time

dtime = datetime.datetime(year, month, day, hour, minute, second)

filename,usize,csize = info.filename,info.file_size,info.compress_size

print "%s:\t\t%d\t%d\t%d%%\t%s" % (filename,usize,csize,(csize*100/(usize+0.01)),dtime.ctime())

total_usize += usize

total_csize += csize

f_in.close()

print "-----------------------------------------"

print "compressed size %d bytes, uncompressed size %d bytes, %d%%" % (total_csize,total_usize,(total_csize*100/total_usize))

if __name__ == '__main__':

import sys

if len(sys.argv)<2:

print "List files in zip file"

print "Usage: %s <zipfile> [files]

" % (sys.argv[0],)

sys.exit(0)

zip_file = sys.argv[1]

files = '*'

if len(sys.argv)>2:

files = []

for f in sys.argv[2:]:

files.append(f)

list(zip_file,files)

posted on 2010-06-29 14:56 imxylz 閱讀(16879) 評論(0) 編輯收藏所屬分類: Python

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